Plant Care

Ferns are among the oldest plants on Earth — and one of the most rewarding you can grow indoors. They bring lush, layered texture to any room, thrive in lower light than most tropicals, and reward attentive care with dramatic, cascading fronds. The challenge? There are thousands of fern species, each with subtly different needs. This guide covers every major indoor fern type, how to care for each, and how to solve the problems that frustrate even experienced growers. What Makes a Fern Different From Other Houseplants? Ferns are non-flowering vascular plants that reproduce via spores rather than seeds. They evolved in forest understories — shaded, humid, and consistently moist environments. This origin shapes everything about their care: No drought tolerance: Most ferns wilt quickly when dry and may not recover High humidity demand: Below 50% RH, most ferns develop brown tips Indirect light preference: Direct sun scorches delicate fronds No dormancy period: Most indoor ferns grow year-round with reduced winter pace Understanding these baseline traits is the key to success with any fern species. Explore our full range of indoor plants to find the perfect fern for your space. The 12 Best Indoor Fern Types: Full Comparison Table Fern Type Scientific Name Light Humidity Difficulty Max Size (indoor) Best For Boston Fern Nephrolepis exaltata Bright indirect 50–80% Moderate 3–4 ft wide Hanging baskets, porches Maidenhair Fern Adiantum spp. Low–medium indirect 60–80% Challenging 1–2 ft Terrariums, bathrooms Bird's Nest Fern Asplenium nidus Low–bright indirect 40–60% Easy 2–3 ft Beginners, low-humidity rooms Staghorn Fern Platycerium bifurcatum Bright indirect 50–70% Moderate 3 ft mounted Wall mounting, statement pieces Rabbit's Foot Fern Davallia fejeensis Bright indirect 50–70% Easy–Moderate 12–18 in Hanging baskets, unique texture Kimberly Queen Fern Nephrolepis obliterata Bright indirect 40–60% Easy 2–3 ft wide Low-humidity homes, offices Silver Lace Fern Pteris ensiformis Low–medium indirect 50–70% Easy–Moderate 12–18 in Terrariums, small spaces Japanese Painted Fern Athyrium niponicum Low–medium indirect 50–70% Moderate 12–18 in Color accent, mixed planters Blue Star Fern Phlebodium aureum Low–medium indirect 40–60% Easy 12–24 in Low-light rooms, beginners Autumn Fern Dryopteris erythrosora Medium indirect 50–70% Moderate 18–24 in Seasonal color, cool rooms Holly Fern Cyrtomium falcatum Low–medium indirect 40–60% Easy 18–24 in Forgiving, low-maintenance Kangaroo Paw Fern Microsorum diversifolium Medium indirect 50–70% Easy–Moderate 18 in Hanging baskets, unique form Boston Fern (Nephrolepis exaltata) The Boston fern is the most popular indoor fern in North America — and for good reason. Its arching, feathery fronds fill hanging baskets and pedestals with lush green drama. Mature plants can reach 3–4 feet across, making them one of the largest fern options for indoor display. Boston Fern Care Light: Bright indirect light, 2–4 hours per day. North or east-facing windows work well. No direct afternoon sun. Water: Keep soil consistently moist (not soggy). Test by pressing a finger 1 inch into soil — water when it feels dry at that depth. Humidity: Needs 50–80% RH. A pebble tray with water beneath the pot, or a nearby humidifier, prevents brown frond tips. Temperature: 60–75°F (15–24°C). Avoid cold drafts and heat vents. Fertilizer: Monthly during spring/summer with balanced liquid fertilizer at half strength. Nothing in winter. Struggling Boston ferns often need more humidity, not more water. Before increasing watering, try boosting ambient humidity to 60%+. Boston ferns thrive alongside other moisture-loving plants. Browse our pet-friendly houseplants — Boston fern is non-toxic to cats and dogs. Maidenhair Fern (Adiantum spp.) Maidenhair ferns are the divas of the fern world — strikingly beautiful, notoriously demanding. Their delicate, fan-shaped leaflets on wiry black stems create a look unlike any other houseplant. Get the conditions right, and they're mesmerizing. Get them wrong, and they collapse seemingly overnight. Why Maidenhair Ferns Are Challenging Maidenhair ferns evolved in humid rainforest stream banks. They need: Consistently moist soil: Never dry out fully — even brief drought causes frond death 60–80% humidity: Most homes are 30–50%, which is insufficient No direct sun: Fronds scorch within hours in direct light No drafts or air conditioning: Airflow fluctuations cause rapid dehydration Best Maidenhair Varieties for Indoors Adiantum raddianum — Delta maidenhair: most common, medium-size leaflets, most widely available Adiantum tenerum — Brittle maidenhair: pink-tinged new growth, slightly more tolerant Adiantum peruvianum — Silver dollar maidenhair: larger leaflets, slightly more forgiving Adiantum pedatum — Northern maidenhair: coldest-tolerant, finger-like frond arrangement For maidenhair ferns, a glass-enclosed terrarium setup provides the humidity stability they crave. Bird's Nest Fern (Asplenium nidus) The bird's nest fern is a refreshing departure from the typical feathery fern look. Its broad, strap-like, bright green fronds emerge from a central rosette (the "nest"), creating an architectural statement that complements modern interiors beautifully. Why Bird's Nest Fern Is Ideal for Beginners Tolerates lower humidity (40–60%) than most ferns Handles lower light than Boston or maidenhair More forgiving of occasional missed watering Grows slowly — doesn't need frequent repotting Bird's Nest Fern Care Tips Light: Low to bright indirect. Darker spots slow growth but won't kill it. Avoid direct sun. Water: Water at the soil level — never pour directly into the central rosette, which causes rot. Keep soil moist but not waterlogged. Frond texture clue: Crispy frond edges = too dry or too much sun. Yellow fronds = overwatering or low light. Staghorn Fern (Platycerium bifurcatum) Staghorn ferns break all the rules of conventional houseplant display. They're epiphytes — they grow mounted on wood, cork bark, or in wire baskets, not in pots. Their two frond types are unique: flat shield fronds (brown, papery, protective) and large antler-like fertile fronds that can reach 3 feet long. Mounting a Staghorn Fern Use a piece of cedar, redwood, or cork bark at least 12 inches across Soak a fistful of sphagnum moss, wring it out, and pack it behind the fern's root ball Secure the fern with fishing line or pantyhose — never use staples or nails through fronds Add a small hook to the back and hang in a spot with bright indirect light Watering a Mounted Staghorn Submerge the entire mount in a bucket of water for 10–20 minutes every 1–2 weeks (weekly in summer, biweekly in winter). Let it drip-dry before rehanging. Never water the shield fronds — they're meant to stay dry. Mist the root area lightly between soaks during dry summer months. Rabbit's Foot Fern (Davallia fejeensis) Named for its fuzzy, rhizome "feet" that creep over the pot edge like furry paws, the rabbit's foot fern is a conversation starter. The rhizomes — technically scale-covered stems — are how the plant stores water and energy, making this fern slightly more drought-tolerant than most. Don't repot the rhizomes into soil — they need to sit on top of the potting mix and air out Humidity: 50–70% preferred but handles 45% better than maidenhair or Boston fern Propagation: Cut a section of rhizome 2–3 inches long, lay it on moist moss, and pin it down; new fronds emerge in 4–6 weeks Kimberly Queen Fern (Nephrolepis obliterata) The Kimberly Queen is often called the "tidy Boston fern." Its upright, sword-shaped fronds grow vertically rather than arching, making it easier to maintain indoors (fewer fronds dropping on floors). It also tolerates lower humidity than a Boston fern — a major advantage for heated or air-conditioned homes. Kimberly Queen vs. Boston Fern Feature Kimberly Queen Boston Fern Frond shape Upright, sword-like Arching, cascading Minimum humidity 40% 50% Shedding Minimal Heavy Indoor/outdoor flex Excellent Good Beginner-friendliness Easier Moderate Blue Star Fern (Phlebodium aureum) The blue star fern has become a design darling — and it earns the hype. Its broad, wavy, blue-green fronds with a silvery dusting are genuinely unlike anything else in the houseplant world. As an epiphyte, its rhizomes sit partially exposed on the soil surface, and it handles lower light and drier conditions better than most ferns. Light tolerance: One of the most low-light-tolerant ferns available Humidity tolerance: Manages at 40–60% — suitable for living rooms without humidifiers Growth rate: Slow — don't expect fast fills; enjoy the architectural fronds that appear gradually Watering: Allow top inch to dry between waterings. More drought-tolerant than Boston or maidenhair Silver Lace Fern / Cretan Brake Fern (Pteris ensiformis) The silver lace fern produces striking two-toned fronds — dark green borders with a bright silver-white center stripe — that look almost variegated. It stays compact (under 18 inches) and tolerates lower light than many ferns, making it excellent for terrarium planting. Watering: Consistent moisture; slightly more forgiving than maidenhair Terrarium use: Ideal — enclosed terrariums provide the humidity it loves Propagation: Division of clumping growth at repotting time Holly Fern (Cyrtomium falcatum) Holly fern is arguably the most beginner-tolerant fern available. Its thick, leathery, holly-like leaflets are far more drought-resilient than typical fern fronds, it handles lower humidity, and it even tolerates brief periods of full shade. It looks bold and sculptural — a great option for rooms where other ferns have failed. Cold tolerance: Handles temps down to 50°F — good for unheated rooms Low humidity tolerance: Manages at 40% without significant browning Watering freedom: Allow top 1–2 inches to dry before watering Indoor Fern Care: The Core Principles Light Requirements for Indoor Ferns Most indoor ferns thrive in bright to medium indirect light. The key rules: North-facing windows: Good for low-light tolerant ferns (bird's nest, holly, blue star) East-facing windows: Ideal for most ferns — gentle morning light, afternoon shade West-facing windows: Fine with sheer curtains to diffuse harsh afternoon sun South-facing windows: Requires distance from glass (6–10 feet) or a sheer curtain Watering Indoor Ferns The single biggest mistake with ferns is irregular watering. Most prefer consistently moist soil — not wet, not dry. Test by pressing your finger 1 inch into the potting mix: Slightly cool and moist: Good — hold off another day or two Dry and room temperature: Water now Soggy or very wet: Wait, check drainage, don't water Use room-temperature, filtered, or distilled water when possible. Ferns are sensitive to fluoride and chlorine in tap water, which causes brown leaf tips over time. Check our complete guide to watering indoor plants for detailed technique. Humidity for Indoor Ferns Most ferns need 50–70% relative humidity — well above typical indoor levels of 30–50%. Strategies that actually work: Ultrasonic humidifier: Best option — place within 3 feet of plants. Run in morning for 4–6 hours. Pebble tray: Fill a tray with pebbles, add water to just below the pebble surface, set pot on top. Evaporation raises local humidity 5–10%. Grouping plants: Clustering moisture-loving plants together raises local humidity through transpiration. Bathroom placement: Natural steam from showers provides excellent conditions if light is sufficient. Misting: Temporary (evaporates in minutes) and can promote fungal issues — use sparingly if at all. Read our complete guide to humidity for houseplants for detailed RH targets and equipment recommendations. Soil and Potting for Ferns Ferns need: Moisture retention: To stay consistently damp between waterings Good drainage: Soggy roots cause rapid rot Aeration: Fine roots need oxygen The ideal fern mix: 60% quality peat-based potting mix + 20% perlite + 20% orchid bark or coarse sand. This holds moisture while preventing waterlogging. Standard potting soil alone compacts too easily and holds too much water for fern roots. Use a pot with drainage holes. Terracotta works well — it wicks excess moisture and allows air exchange, which ferns appreciate. Read our full comparison of terracotta vs plastic pots to choose the right container. Fertilizing Indoor Ferns Ferns are light feeders. Over-fertilizing burns roots and causes brown frond tips. The right approach: Frequency: Monthly during spring and summer. Skip fall and winter entirely. Formula: Balanced liquid fertilizer (10-10-10 or similar), diluted to half the recommended strength Application: Water normally first, then apply fertilizer to moist soil (never fertilize dry roots) Organic option: Worm castings added to potting mix at repotting time provide gentle, slow-release nutrition Repotting Indoor Ferns Ferns generally prefer being slightly root-bound. Repot when: Roots are circling the bottom of the pot or emerging from drainage holes The plant dries out within 1–2 days of watering (roots have displaced all soil) Growth has stalled for 2+ years despite good conditions When to repot: Spring only — avoid fall or winter repotting when growth is slowest. How to repot: Go up one pot size (1–2 inches larger diameter). Gently tease apart compacted root ball, remove dead roots (black or mushy), and plant in fresh fern mix. Water thoroughly and keep in bright indirect light for 2–3 weeks while recovering. Propagating Indoor Ferns Ferns reproduce via spores in nature, but most indoor propagation is done by division — much simpler and faster. Division Method (Best for Most Ferns) Remove the fern from its pot and set it on a flat surface Identify natural clumping sections — each section needs roots AND fronds Use a clean, sharp knife to separate sections (don't just pull) Plant each division in moist fern mix, water lightly Cover with a clear plastic bag or dome to maintain humidity for 2–3 weeks while the divisions establish Gradually remove covering once new frond growth appears Rhizome Propagation (Rabbit's Foot, Staghorn) Rhizome ferns (rabbit's foot, staghorn, kangaroo paw) can be propagated by cutting healthy rhizome sections 2–3 inches long and securing them to moist sphagnum moss. New growth takes 4–8 weeks. This is similar to the propagation technique used for string-of-pearls succulents — both rely on stem/rhizome sections rather than seeds. Fern Troubleshooting: Common Problems and Fixes Problem Most Likely Cause Fix Brown frond tips Low humidity or fluoride in tap water Boost humidity to 60%+; switch to filtered or distilled water Yellowing fronds Overwatering, root rot, or low light Check root health; improve drainage; move to brighter indirect spot Wilting despite moist soil Root rot from soggy soil Unpot, inspect roots, trim rotten sections, repot in fresh airy mix Entire fronds turning brown and crispy Drought, too much direct sun, or heat vent Water more consistently; move away from direct sun and heat sources New fronds unfurling brown Low humidity or fluoride toxicity Humidity boost; flush soil with filtered water 3–4 times to dilute minerals Dropping fronds / heavy shedding Stress from repotting, cold drafts, or sudden light change Maintain stable conditions; remove dead fronds; new growth should follow Pale, washed-out fronds Too much light or light that's too direct Move further from window or add sheer curtain Slow growth / no new fronds Under-fertilized, root-bound, or too dark Repot if root-bound; monthly fertilizer in spring/summer; increase light White crusty deposits on soil Mineral buildup from tap water or fertilizer Flush soil thoroughly with filtered water; reduce fertilizer frequency Scale or mealybugs Pest infestation Isolate plant; treat with neem oil or insecticidal soap; repeat weekly for 3 weeks Common Fern Pests Ferns are susceptible to several common houseplant pests, particularly in low-humidity conditions: Spider mites: Thrive in dry air — fine webbing and stippled fronds. Treat with insecticidal soap; raise humidity to deter re-infestation. Scale: Brown bumps on stems and fronds. Scrape off manually and treat with neem oil. Mealybugs: White cottony clusters in crevices. Dab with rubbing alcohol on cotton swab; repeat weekly. Fungus gnats: Small flies around soil — larvae damage roots. Let top inch of soil dry between waterings; treat with BTi (Bacillus thuringiensis israelensis) drench. Are Ferns Safe for Pets? Most true ferns (Nephrolepis, Asplenium, Adiantum, Platycerium) are non-toxic to cats and dogs according to the ASPCA. This makes them excellent choices for pet households. However, confirm the specific species before purchasing, as some plants sold as "ferns" (asparagus fern, for instance) are not true ferns and are toxic to pets. Browse our full range of pet-safe houseplants including true ferns and other non-toxic options. Where to Place Indoor Ferns for Best Results Bathroom: Ideal for maidenhair, Boston, and bird's nest ferns — steam from showers raises humidity naturally Kitchen: Good for moderate-humidity ferns if the space has a window; steam from cooking helps Living room: Choose more tolerant varieties (bird's nest, holly, blue star, Kimberly Queen); add a humidifier Home office: Blue star, bird's nest, or holly fern — all handle the drier conditions of heated/cooled rooms better than Boston or maidenhair Terrariums: Perfect for maidenhair, silver lace, and small fittonia — enclosed glass maintains constant high humidity Looking for plants that thrive in specific rooms? Explore our easy-care houseplants collection for low-maintenance options alongside ferns. Ferns as Terrarium Plants Enclosed terrariums are one of the best environments for demanding fern species. The sealed glass maintains 70–90% humidity with zero effort — exactly what maidenhair and silver lace ferns need. When building a fern terrarium: Use a drainage layer: Pebbles or LECA at the bottom, topped with a mesh barrier, then fern potting mix Mix sizes for visual interest: Combine a small maidenhair with silver lace fern and a fittonia nerve plant for contrasting textures Leave the lid slightly open: Fully closed terrariums can cause fungal issues; a small opening allows airflow Low light compatible: Most terrarium-suitable ferns grow well under indirect window light or grow lights Browse our full terrarium plants collection for companion plants that thrive in high-humidity enclosed environments. Seasonal Fern Care Calendar Season Watering Fertilizing Humidity Key Tasks Spring Increase as growth picks up Begin monthly feeding Monitor — heating systems ending Repot if root-bound; divide overgrown plants Summer Most frequent — check every 2–3 days Monthly Often naturally higher — monitor for pests Watch for spider mites; increase humidity Fall Reduce slightly as growth slows Stop fertilizing by October Begin running humidifier as heating starts Move away from heating vents Winter Less frequent — soil stays moist longer None Critical — heating dries air significantly Run humidifier; use pebble trays; avoid cold drafts See our complete winter houseplant care guide for detailed seasonal care strategies for all tropical plants. Choosing the Right Fern for Your Home Match the fern to your conditions — don't try to force a maidenhair fern into a dry apartment. Here's a quick selection guide: Your Situation Best Fern Choice Low natural light, no humidifier Blue star fern, holly fern, bird's nest fern Bright bathroom with steam Maidenhair fern, Boston fern, silver lace fern Hanging basket display Boston fern, rabbit's foot fern, Kimberly Queen Wall-mounted statement piece Staghorn fern Terrarium project Maidenhair fern, silver lace fern, bird's nest (small specimens) Pet-safe household Boston fern, bird's nest fern, maidenhair fern (all ASPCA-safe) Complete beginner Bird's nest fern, holly fern, Kimberly Queen Experienced grower seeking a challenge Maidenhair fern Frequently Asked Questions About Indoor Ferns Why does my fern keep dying? The three most common causes: inconsistent watering (either letting it dry completely or overwatering), low humidity (below 50% for most species), and direct sunlight. Address all three simultaneously — improving just one often isn't enough for sensitive species like maidenhair. Can ferns grow in low light? Some can. Bird's nest fern, blue star fern, and holly fern tolerate low light reasonably well. Boston fern and maidenhair fern struggle in very low light — they need bright indirect light to maintain healthy frond production. How often should I water my indoor fern? That depends on the season, pot size, soil type, and humidity. Rather than a fixed schedule, check soil moisture daily for the first month until you learn your plant's rhythm. Most indoor ferns need watering every 3–5 days in summer, 5–7 days in winter. Do ferns need fertilizer? Yes, but very lightly. Monthly feeding at half strength during spring and summer is ideal. Skip fall and winter entirely. Excess fertilizer causes brown tips and root burn. Can I grow ferns outside in summer? Absolutely — most indoor ferns thrive on outdoor patios in warm months. Place in a shaded or dappled-light spot (no direct afternoon sun). They'll grow more vigorously outside but need to be gradually acclimated over 1–2 weeks. Bring back indoors before nighttime temps drop below 55°F. Are all ferns safe for cats? True ferns (Nephrolepis, Asplenium, Adiantum, Platycerium) are generally ASPCA-safe for cats and dogs. Asparagus fern — commonly sold but not a true fern — is toxic. Always verify the exact botanical species before placing in a pet household. Final Thoughts: The Right Fern for Every Grower Ferns aren't all created equal. The maidenhair fern will humble even experienced growers with its exacting demands, while the bird's nest fern will reward beginners with effortless green growth. The key is matching species to conditions — and then staying consistent. Ferns don't forgive erratic care, but they reward attentive, consistent growers with some of the lushest foliage in the entire plant kingdom. Ready to add a fern to your collection? Explore our full plant collection and browse our best-sellers for tried-and-tested varieties our customers love. For complementary high-humidity companions, our terrarium plants and fittonia nerve plants thrive alongside ferns in any humidity-boosted display.